How to deal with insulation damage of oil-immersed transformer?
Writer： Hengfeng you electric Time：2023-04-03 views：times
How to deal with the insulation damage caused by the use of oil-immersed transformers? Today Hengfengyou editor tells you how to operate.
1. Check the transformer in operation and check the oil leakage of each part. There is no moisture in the transformer body to prevent moisture and air from entering the transformer and causing damage to the transformer insulation.
2. The oil seal of the transformer respirator should maintain a certain oil level and keep it unblocked, and the desiccant should be kept dry to ensure good moisture absorption.
3. Check regularly to ensure that the transformer explosion-proof membrane and safety relief valve are intact, and prevent direct contact with air, which increases the moisture in the transformer oil and deteriorates the insulation performance of the oil.
4. When supplying oil to the transformer, pay attention to the oil quality in the oil conservator to prevent the oil from deteriorating due to the oil supply. It is forbidden to supply oil from the bottom to the oil tank to prevent air and impurities from the bottom of the tank from entering the transformer body, especially to prevent metal impurities from entering Inside the transformer.
5. When a signal is sent out after the light gas protection is activated, the gas should be taken in time to check, determine the composition, and take an oil sample for chromatographic analysis to find out the cause and eliminate it in time.
6. The light gas protection of the transformer in operation should be put into operation reliably. Unprotected transformers must not be put into operation. If the protection needs to be lifted in a short time during work, measures should be taken, and it should be restored immediately afterwards.
7. The temperature of the transformer winding and the oil temperature should be monitored. When the alarm temperature is approaching, the load, cooler and ambient temperature should be analyzed in time, and effective control should be carried out to find the inside of the transformer in time. Potential failure.
8. Carefully check the position indicated by the oil flow indicator. Once the submersible pump is found to stop running, it must be switched on in time, otherwise the oil temperature will rise rapidly, threatening the safe operation of the transformer.
9. Frequently check the action recorder of the transformer surge arrester and record the number of actions. After discovering that the arrester is in action, try to stop the transformer and check it.
10. Focus on checking the oil sample hole bolts of the transformer body to prevent oil leakage caused by maintenance personnel if not tightened after sampling.
11. After the internal fault of the transformer trips, the oil pump should be cut off as soon as possible, and the operation of the oil pump should be stopped to prevent the free metal particles in the fault from entering the non-fault part of the transformer.
12. Prevent the transformer winding from overheating, insulation deterioration, and burnout. Reasonably control the temperature rise of the top oil during operation.
Especially for transformers with forced oil circulation cooling, when the oil temperature rise exceeds the allowable value, the load should be quickly controlled, and the oil temperature rise should be kept within the specified range, otherwise the transformer will reduce the load.
When the transformer is overloaded, it is necessary to closely monitor the oil temperature rise within the specified value, and compress the load as much as possible to reduce the overload operation time and prevent the accelerated aging of the insulation due to long-term use. High temperature operation.
The above is an introduction to the insulation damage of oil-immersed transformers. If you still don’t understand, you can call our transformer factory staff: +86 15853252696, or if you need more information on the specifications and models of oil-immersed transformers, you can contact us at any time.
